y=3x+7

y=3x-9

y=3x+2

y=3x-2

y=3x+5

y=3x-8



All of those are parallel to y=3x+1,

or any other line of the form y=3x+b, and you can

pick any number for b.  They all have the same slope.

And when lines slope the same way (have the same slope)

they are parallel.



Edwin 

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